Aqa As Level Chemistry Paper 1 Actual Final Exams With Answers 2023!!

Describe the electrical conductivity of an ionic compound. [3] {Ans: - Can conduct electricity when molten or in solution. - When compound is solid the ions are held in fixed position and cannot flow. - When compound is molten/in solution, the ions are free to move and carry charge.}How does an increase in pressure alter Kc [1] {Ans: No effect.}State three factors affecting electronegativity. [3] {Ans: Nuclear charge (higher= more electronegative) Atomic radius (lower=more electronegative) Shielding (lower=more electronegative)}Describe how a polar covalent bond forms. [3] {Ans: A covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electronegative atom, making it slightly negative and the other atom slightly positive. May create a permanent dipole moment.}Draw a Hess' cycle when given enthalpies of combustion. [1] {Ans: }Define disproportionation [1] {Ans: A redox reaction in which the same element is both oxidised and reduced}Describe ion drift: [2] {Ans: - Some of the ions pass through a hole in the negatively charged plate, forming a beam of particles. They travel along the 'flight tube' towards the detector. - As the ions are travelling at different speeds, they drift apart